Apparatus for making molds.



L. J. WING.

, APPARATUS r011 MAKING MOLDS.

APPLIOATION FILED FEB. 23, 1907. 907 ,21 2, Patented Dec. 22, 1908.

2 SHEETS-SHEET 1.

L. .T. WING. APPARATUS FOR MAKING HOLDS. APPLICATION mum ran. 23, 1907.

907,212, Patented Dec.22, 1908.

2 SHEETS-SHEET 2.

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APPARATUS FOR MAKING MOLDS.

Specification of Letters Patent.

Patented Dec. 22, 1908.

Application filed February 23, 1907. Serial No. 358,797.

To all whom it may concern:

Be it known that I, Lnvr J. WING, a citizen of the United States ofAmerica, and a resident of East Orange, county of Essex, New Jersey,have invented certain new and useful Improvements in Apparatus forMaking Molds, of which the following is a specification.

The present invention relates to the art of molding, and has moreparticularly reference to an apparatus for forming a casting mold usedto produce turbine wheels or othe articles.

The object of the invention is to enable turbine wheels to be producedquickly and cheaply and consists of the hereinafter described featuresof construction.

In the said drawings :-Figures 1 and 2 are respectively a plan and avertical sectional view of a temporary supporting board which may be andis employed in carrying out the invention. Fig. 3 is a plan view of themain pattern ring. Fig. 4 is a perspective view of a portion of the mainpattern ring and of the auxiliary pattern ring. Fig. 5 shows one of thebuckets. Fig. 6 is a plan view of the turbine wheel as produced by theherein described process. Fig. 7 shows, a portion of this turbine wheellooking at the outer periphery thereof. Figs. 8, 9, 10 and 11 arevertical sectional views of the mold showing the several steps employedin the herein described process.

Similar characters of reference indicate corresponding parts in theseveral views.

1 indicates a temporary supporting board which is shown here as a plainwooden board having a central circular recessed portion 2. Surroundingthe central recess are a plurality of bucket spacing members 3 shownhere as 4 denotes the main pattern which is here shown as a circularring. This main pattern is composed of a main portion 5, and a reducedportion 6 provided with the spacing members 7, whose outer periphery isflush With the outer periphery of the main portion. These spacingmembers extend only part of theway to the upper surface of the ring andare adapted to support an auxiliary pattern 8, here shown in the form ofa ring. When this auxiliary pattern is placed on the spacing members 7,a structure is produced whose configuration is that of the bucketsupporting member to be cast.

The supporting board and the main pattern ring are provided Withcooperating registering members in the form of apertures 9 and lugs 10so that when the main pattern is placed in position the spacing memberson the board and on the main pattern will be in alinement.

The bucket is indicated by 11 and is provided with an impact surface 12and with a tail 13. This bucket may be produced in any manner foundsuitable as by drop-forging or otherwise.

The mechanism for carrying out the process now being understood theprocess itself will be described.

The main pattern is laced on the temporary supporting board in such amanner that the bucket spacing members are in alinement. The buckets arethen arranged circumferentially around the pattern on the board byinserting their tails 13 into the slots of the main pattern between thespacing members. The auxiliary pattern or top ring is then placed on theupper surface of the spacing members of the main pattern. The interiorof the main pattern is then filled up with the body of sand indicated by14 and i the buckets are surrounded by the body of sand 15 on theirupper side, which body of sand slopes downward toward the outer edge ofthe supporting board. One portion (here called a cope and indicated by16) of the flask is now placed on top of the partially formed mold. Theappearance of the parts after these steps have been taken is indicatedin Fig. 8. The mold is now reversed and the supporting board removed.The mold is completed by filling up with sand on the other side of thebuckets in a manner similar to the body of sand indicated by 15. Theother portion (here called a drag and indicated by 17) of the flask isnow placed in position. These several steps are shown as having beencompleted in Fig. 9. The mold is reversed again, the cope is removed,the auxiliary pattern or top ring is removed and the-cope is replaced.Part of the pattern has now been withdrawn. The result of these steps isshown in Fig. 10. The mold is reversed once more, the drag is removed,the main pattern is removed, and the drag is replaced. The completeWithdrawal of the pattern leaves the buckets embedded in the mold andextending into the casting chamber 18. The metal is now poured and runsinto the said casting chamber whereby a bucket supporting member 19 iscast on the previously formed buckets, forming a structure shown inFigs. 6 and 7. The completed: I mold ready to be poured is shown in Fig.11.

The drag is provided with a pouring, gate, 20 connected by channels 21to a circumferential gutter 22 which communicateswith the castingchamber of thermold by means of the ducts 23.

What is claimed is In the system of casting one member on another andpreviously formed member, an apparatus for forming a casting moldcomprising a main pattern provided with recesses for the reception ofthe previously formed; members, a temporary supporting 15 board forholding the main pattern and for supporting the previously formedmembers, and a top ring adapted to be placed over the main pattern. I

Signed at New York city this 18th day of 20 February 1907.

Levi; J. WING.

Witnesses:

S. G. ToMPKrNs, AXEL V. BEEKEN.

